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    "What? You can tell that he is a teenager just based on these 8 characters?" A Le was puzzled.

    "The words on the paper are splayed and crooked. They are not in line with normal writing habits at all. It is speculated that they are disguised handwriting by the left hand." I continued to explain without pausing: "As we all know, the left hemisphere of the brain generally controls the activities of the right hand, and the right hemisphere of the brain generally controls the activities of the right hand.  Left hand activity. Because the right hemisphere that directly controls left-hand writing has not yet formed a central function to control speech activities, the stored text information required for left-hand writing can only be obtained from the left hemisphere of the brain. The existence of the language dominant hemisphere is due to the difference in brain control of left- and right-hand writing.  Physiological reasons. This is the key to distinguishing the fake handwriting of the left hand.

    "When using the left hand to disguise handwriting, the right hemisphere that controls the left hand needs to obtain text information from the left hemisphere and control the left hand to complete the writing action under the control of the brain center. The transfer of writing skills will cause the left hand to write slowly and with uncoordinated proportions.  , the strokes are dull, with involuntary dragging and reflex hooks, the text layout is uneven, the text is not correct, the fonts are large, the writing pressure is light and uneven, and the overall appearance is a weak and clumsy image."

    "Well, these characteristics you mentioned are all consistent. It seems easy to see the left-hand writing, but how to judge whether it is a teenager?" A Le stood aside and asked.

    "This point needs to be analyzed from many aspects. First, it is the writing level. The writing level refers to the proficiency in writing, such as whether the words are written neatly and rigorously, whether the structure is even and appropriate, whether the size of the words is proportional, and whether the pen is used  Smooth, natural, powerful, etc. Generally speaking, if you are older and have been engaged in writing practice for a longer time, your writing level will be higher; if you are younger and have been engaged in writing practice for a shorter time, your writing level will be lower; if you have a higher education level and have received education and training for a longer time, your writing level will be higher.  The level is high, and vice versa; if you are engaged in a profession that requires you to write often, your writing level will be high; if you write less or not at all, your writing level will be low; if you like and practice writing regularly, your writing skills will improve quickly, and your writing level will be high.  , etc. Based on these factors, the writing level of these 8 words on the paper is very low, which is most likely caused by various reasons such as age level, educational level, and little practice in writing skills.

    "If we just look at this, we can't draw a conclusion. We also need to analyze the physiological jitter phenomenon when writing. Physiological jitter is the jitter of handwriting caused by changes in the writing center, nerve conduction and writing organs. We all know that the writing organ  From the brain to the hand, and then from the hand to the brain, it is an automatically controlled closed loop system. There is a two-way information system between the central system and the limb system. After the writing information from the cerebral cortex reaches the hand, causing the writing activity, the hand's writing is promptly  The activity information is fed back to the cerebral cortex, thereby controlling part of the instructions to correct, adjust and transmit continuous activity information to achieve precise writing activities.

    "Physiological jitters can be divided into many types, such as common distraction-type jitters, out-of-control jitters, mental stress-type jitters, jitters caused by uneven padding, jitters in bumpy environments, etc. From on-site analysis, writing conforms to  Stressful shaking, this situation shows that the perpetrator was highly stressed mentally during the crime, which affected the normal movement of the writing limbs, and the written words will show some abnormalities. This kind of shaking is not the perpetrator  What can be subjectively controlled. Generally, when this happens, it is the first time a crime is committed. The last key point is the pen used by the perpetrator."

    "Pen?"

    "Didn't you notice that this is ballpoint pen writing?"

    "Of course I found it, what happened?"

    "I just observed the scene specifically. The shop run by the deceased did not sell stationery, and there was only a hero pen in his drawer. Why did ballpoint pen writing appear on the scene?"

    "The suspect also brought a pen with him when he committed the crime?"

    "Yes, ballpoint pens can be divided into specifications such as 1 mm, 0.7 mm, and 0.5 mm according to the writing width of the pen tip ball; according to its material, they are divided into two types: water-based ballpoint pens and oil-based ballpoint pens. Because water-based ballpoint pens write smoothly and smoothly, and the lines are even.  It is an ideal writing tool and is mostly used by students. Oil-based ballpoint pens have stable writing performance, long shelf life and high ink viscosity, so the writing feel is relatively heavy and are mostly used by staff engaged in accounting.

    "So far, our country does not have the ability to independently produce ballpoint pen nib balls. Most of the ballpoint pen refills sold on the market now rely on imports. Imported products have uniform specifications, so I can according to the smell and appearance of the refill ink.  The color is used to determine the domestic agent brand. If I remember correctly, the perpetrator used a Zhencai brand 0.5mm water-based ballpoint pen."

    After saying that, I put down the paper: "The suspect left a note when he committed the crime.??This is a sign of immature thinking, coupled with the obvious disguise of his left hand, physiological shaking when he first committed the crime, low writing skills, and carrying a ballpoint pen that only students often use. Analyzing a combination of multiple factors, he is extremely capable.  Probably teenagers.  "

    ¡°Normally a veteran would not choose such a poor little shop to start with.¡± A Le added with approval.

    I put the paper into the evidence bag and began to process the fingerprints on various furniture and furnishings. Brother Ming and Lao Xian also quickly walked into the house.

    "The body is 165 centimeters long. Except for blunt force blows to the head, there are no external injuries. Judging from the color and viscosity of the blood, the time of death did not exceed 12 hours." Ming Ge continued to analyze, "There are many wounds on the left side of the forehead of the deceased.  The wounds were caused by irregular blows, and the skin tissue of the wounds accumulated diagonally downwards, so it can be analyzed that there was a height difference between the deceased and the suspect. Judging from the depression of the wounds, the suspect's right hand was the common hand, and he used a lot of force when committing the crime.  Heavy, analyzed to be a young adult. Guoxian, look at the red powder in the wound."

    Lao Xian carefully wiped a circle along the wound of the deceased with filter paper. Soon the white paper was covered with red particles. After careful observation with a magnifying glass, Lao Xian came to a definite answer: "The main component is dioxide trioxide."  Iron, this should be the composition of ordinary red bricks.¡±

    "Xiaolong, did you find any bricks when you surveyed the site?"

    "No."

    "Ye Qian."

    "Director Leng, tell me."

    "The suspect must have taken away the bricks used in the crime. Tell Team Xu to organize more police forces to search outside the central site."

    "clear."

    After Brother Ming finished his instructions, he turned his attention to the corpse: "Judging from the wounds caused by blunt force blows, they are not fatal. The cause of his death was craniocerebral hemorrhage. The deceased was likely to suffer from cardiovascular and cerebrovascular diseases.  The suspect's attack may have been an inducement to kill, and his subjective purpose should not have been to kill someone."

    ¡°There was property damage at the scene.¡± I added in a timely manner.

    "Well, it seems that the possibility of property embezzlement is relatively high." Brother Ming covered the deceased completely with a sheet. "The body is like this for now. We will go back and do an autopsy to see if there are any specific findings. Xiaolong."

    "exist."

    "What property damage is there in the house?"

    "Further verification is needed. In addition to cash at the scene, a lot of goods on the shelves were also stolen."

    "Goods?" Brother Ming glanced at the clearly flipped shelves, "Can you confirm what is missing?"

    "I found this at the scene." I handed a stamped notebook to Brother Ming: "Because the store is small, the incoming and outgoing of goods are recorded in detail in this account book. With this, we can easily find it."  Get out the lost stuff.¡±

    "Well, that's easy to handle!" (Remember the website address: www.hlnovel.com
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